Loom stop motion device



1967 R. A. DUPRE 3,297,058

' LOOM STOP MOTION nmvicm Filed May '7, 1965 INVENTOR.

ROLAND A. DUPRE ATTORNEYS United States Patent 3,297,058 LOOM STOP MOTION DEVKE Roland Albert Dupre, 27 Kent St, Cumberland, RI. (12864 Filed May 7, 1965, Ser. No. 454,000 2 Claims. (Cl. 139-371) This invention relates to a weft yarn stop motion and is an improvement on a part of the apparatus shown in my Patent 3,012,588, dated December 12, 1961. weft stop motion of this patent, the circuit was completed only at a time when the beat-up occurred, the completion of the circuit being by means of contact between a part carried by the frame of the loom, such as spaced posts, and a part carried by the lay which bridged the space posts on the frame at the time of beat-up or by some equivalent means so that the stop motion circuit could only operate at the time of beat-up.

In the above-mentioned patent there was shown in FIGS. 9 to 11 inclusive a pair of resilient wires carried by the frame with which the part carried by the lay con tacted as a part of the stop motion circuit, the part carried by the lay being shown in these figures as a metal strip carried by the shuttle which engaged the space wires on the frame, and although these wires are not complicated, some little trouble is involved in mounting them in place.

This invention comprises an improvement in the space means mounted on the frame part of the loom with which the part carried by the lay contacts and consists essentially of helical coils which may be screwed onto threaded posts and replaceable by simply unscrewing them from position. I

One of the objects of the invention, accordingly, is to simplify the mounting of the posts on the frame with which the part on the lay contacts.

Another object of the invention is to provide resilient members in the form of parts which may be easily threaded into engagement with a simple threaded stud and easily removed therefrom.

Another object of the invention is to provide a part which will fiex readIly when engaged by the shuttle and yet make good contact.

Another object of the invention is a device which may have a long life.

With these and other objects in view, the invention con-- sists of certain novel features of construction as will be more fully described and particularly pointed out in the appended claims.

In the accompanying drawings: FIG. 1 is a plan view somewhat schematic illustrating a fragmental portion of a loo-m with my invention placed thereon;

FIG. 2 is a sectional view showing the posts of this invention mounted in position on the bar over which the- I nection of a lead wire to the threaded stud.

In the V As pointed out above, this invention is a replacement of the resilient wires with which the shuttle engaged as shown in FIGS. 9, 10 and 11 of my Patent 3,012,588, dated December '12, 1961, and comprises helically wound wire to act as a post in place of the wires shown in said patent.

In FIG. 1 of the drawings a loom frame is designated generally 10 which carries a cylindrical bar 11 over which the fabric, which is woven is shown at 12, extends there being a plurality of strips of narrow fabric 12 in the loom. The lay is designated generally 15 which carries shuttles 16 from which the weft 17 leads to the fabric 12. The stop motion which is explained more fully in the above mentioned Patent 3,012,588 involves the completion of the circuit at beat-up by means of a metal bar 20 carried by the loom lay, here shown as on the forward edge of the shuttle, engaging the part shown carried by the frame of the loom and which is designated generally and is shown by itself in FIG. 3.

This part 25 carried by the loom frame comprises a bracket having a vertical arm 26 and horizontal arm 27. The horizontal arm 27 supports a U-shaped fork 28 with legs 29 of insulating material extending therefrom which is clamped on to the arm 27 by an insulating member 30 extending outwardly beyond. the arm 27 and bolted to the fork 28 by screws 31 spaced from arm 27. The legs 29 are each provided with a threaded stud 35 which has a head 36 on the lower side of the leg 29 with a wire terminal 37 beneath the head and provided with a socket 38 for the reception of an electrical conducting wire, while a nut 39 threadingly engages the stud 35 to bind it firmly on to the leg 29 with a threaded portion extending upwardly therefrom for a short distance.

A resilient post 40 has telescopic engagement with each stud 35. This part 40 comprises a helical coil of wire of a size to threadingly engage the grooves of the threaded stud 35 so that in order to mount the resilient post 40 upon the stud 35 it is merely necessary to screw the same into place and by means of the fingers it is possible to manually screw this helical wire onto the stud 35 and against the nut 39 sufficiently tight so that it cannot be removed by the fingers. Apparently the unscrewing movement attempted meets with so much resilience of the post that the post cannot be removed from the stud by hand. In order to remove the post from the stud it is necessary to turn the head 36 beneath the leg 29 slightly such as by a screwdriver when the post is released from engagement with the nut 39 and may be easily taken from position. Thus, the post is most easily removed and replaced should occasion require.

However, it is found that this post has an exceptional further advantage in that it flexes to such an extent that continued use for several years will not wear the post sufficiently if left in one spot so that it need be replaced. However, should wear occur by means of a slot 43 in the arm 26 of the bracket, the bracket may be raised and again clamped on to the bar 11 by means of a screw 44 extending through the slot 43 to provide a new location of contact and this raising may occur many times so that the entire length of the post may be utilized by movement in small increments for extended use over a multiple of years with a single resilient helical post here shown.

I claim:

1. In a. stop motion for a loom of the character where a part carried by the lay completes a circuit by contact with a :part carried by the loom frame, said part carried by the loom frame comprising a pair of grooved studs fixed on the frame, resilient posts comprising helical coils, said studs and helical coils having telescopic engagement for removably securing a post to each stud for bridging engagement by a part carried by the lay.

2. In a stop motion as in claim 1 wherein studs are threaded and said posts are screw threaded on to said studs.

References Cited by the Examiner UNITED STATES PATENTS Pruitt 13937l Johnson 139371 Ballard 139-371 Hall 13937l Dupre 139-371 MERVIN STEIN, Primary Examiner.

H. S. JAUDON, Assistant Examiner. 

1. IN A STOP MOTION FOR A LOOM OF THE CHARACTER WHERE A PART CARRIED BY THE LAY COMPLETES A CIRCUIT BY CONTACT WITH A PART CARRIED BY THE LOOM FRAME, SAID PART CARRIED BY THE LOOM FRAME COMPRISING A PAIR OF GROOVED STUDS FIXED ON THE FRAME, RESILIENT POSTS COMPRISING HELICAL COILS, 